Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 421623
Title A strategy for fast structural elucidation of metabolites in small volume plant extracts using automated MS-guided LC-MS-SPE-NMR
Author(s) Hooft, J.J.J. van der; Mihaleva, V.V.; Vos, R.C.H. de; Bino, R.J.; Vervoort, J.J.M.
Source Magnetic Resonance in Chemistry 49 (2011)Suppl. S1. - ISSN 0749-1581 - p. S55 - S60.
DOI http://dx.doi.org/10.1002/mrc.2833
Department(s) Biochemistry
PRI BIOS Applied Metabolic Systems
Laboratory of Plant Physiology
AFSG Staff Departments (FBR)
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) nuclear-magnetic-resonance - solid-phase extraction - natural-products research - liquid-chromatography - mass-spectrometry - flavonoids - tomato - identification - metabolomics - hyphenation
Abstract Fast and reliable metabolite identification based on automated MS-guided HPLC-MS-SPE-NMR metabolite extraction combined with an automated 1H NMR spectrum fitting was developed. Positional isomers as structure 1 and 2 were easily distinguished. In many metabolomics studies, metabolite identification by mass spectrometry (MS) often is hampered by the lack of good reference compounds, and hence, NMR information is essential for structural elucidation, especially for the very large group of secondary metabolites. The classical approach for compound identification is to perform time-consuming and laborious HPLC fractionations and purifications, before (re)dissolving the molecules in deuterated solvents for NMR measurements. Hence, a more direct and easy purification protocol would save time and efforts. Here, we propose an automated MS-guided HPLC-MS-solid phase extraction-NMR approach, which was used to fully characterize flavonoid structures present in crude tomato plant extracts. NMR spectra of plant metabolites, automatically trapped and purified from LC-MS traces, were successfully obtained, leading to the structural elucidation of the metabolites. The MS-based trapping enabled a direct link between the mass signals and NMR peaks derived from the selected LC-MS peaks, thereby decreasing the time needed for elucidation of the metabolite structures. In addition, automated 1H NMR spectrum fitting further speeded up the candidate rejection process. Our approach facilitates the more rapid unraveling of yet unknown metabolite structures and can therefore make untargeted metabolomics approaches more powerful
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